微小重力下での窒化反応によるチタンの微視組織 Nitriding Reaction of Titanium under Microgravity : Observation of the Microstructure

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In order to simulate the influence of microgravity on the reaction between gas and metallic powder, the experiments of heating the titanium wire specimens with 0.5 mm diameter by electric current in 0.5 absolute atmospheric pressure (0.5 kg/cm<SUP>2</SUP>) of pure nitrogen gas environment under normal gravity (g=9.8m/s<SUP>2</SUP>=1G) and microgravity (g=μG) using a drop shaft that enables 10 seconds duration of microgravitational condition is carried out. The influence of gravitational acceleration on the morphological changes in optical microscopic microstructures of the specimens is studied. The nitriding reaction becomes active under microgravity by temperature increase of the specimens with the heating time due to the suppression of thermal convection and the cooling effect of the nitrogen gas on the specimens is reduced. The results of the present study are explained by the gravitational acceleration effects.

収録刊行物

  • 粉体および粉末冶金  

    粉体および粉末冶金 46(1), 9-15, 1999-01-15 

    Japan Society of Powder and Powder Metallurgy

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各種コード

  • NII論文ID(NAID)
    10002053555
  • NII書誌ID(NCID)
    AN00222724
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    05328799
  • NDL 記事登録ID
    4639490
  • NDL 雑誌分類
    ZP41(科学技術--金属工学・鉱山工学)
  • NDL 請求記号
    Z17-274
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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